As an example of the new policy, OPM said that during a break one employee can engage another “in polite discussion of why his faith is correct and why the non-adherent should rethink his religious beliefs." The employee should stop if the “nonadherent” colleague asks him to, according to the guidance.

I think the “non-adherent” should be given as much time to rebut the person bothering them in the first place. Something like, “hey ding-a-ling, here is why your book club is false and the one true way is the Church of the Subgenius because…”